Overview
The LM809M3X-3.08/NOPB is a 3-pin voltage supervisor integrated circuit (IC) designed by National Semiconductor, now part of Texas Instruments. This component is specifically engineered to monitor the power supply voltage in microprocessor and digital systems, providing a reset signal during power-up, power-down, and brown-out conditions. It is an active-low reset IC, meaning it asserts a reset signal when the supply voltage drops below a predefined threshold and maintains this signal for a specified duration after the voltage recovers.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | LM809M3X-3.08/NOPB |
| Manufacturer | National Semiconductor (Texas Instruments) |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 105°C (TA) |
| Voltage - Threshold | 3.08V |
| Number of Voltages Monitored | 1 |
| Reset Timeout | 140ms Minimum, 240ms Typical |
| Output | Push-Pull, Totem Pole |
| Reset Type | Active Low |
| Supply Current | 15 µA Typical |
Key Features
- Precision monitoring of supply voltages with available threshold options of 2.63 V, 2.93 V, 3.08 V, 4.38 V, and 4.63 V.
- Superior upgrade to MAX809 and MAX810.
- Fully specified over temperature.
- 140-ms minimum power-on reset pulse width, with a typical duration of 240 ms.
- Active-low RESET output for LM809 and active-high RESET output for LM810.
- Ensured RESET output valid for VCC ≥ 1 V.
- Low supply current of 15 µA typical.
- Power supply transient immunity.
Applications
- Factory Automation
- Building Automation
- Programmable Logic Control
- Renewable Energy
- Microprocessor Systems
- Computers and Controllers
- Intelligent Instruments
- Portable/Battery-Powered Equipment
- Automotive Systems
Q & A
- What is the primary function of the LM809M3X-3.08/NOPB?
The primary function is to monitor the power supply voltage and assert a reset signal during power-up, power-down, and brown-out conditions.
- What is the voltage threshold for the LM809M3X-3.08/NOPB?
The voltage threshold is 3.08 V.
- What is the operating temperature range of the LM809M3X-3.08/NOPB?
The operating temperature range is -40°C to 105°C.
- What type of reset output does the LM809M3X-3.08/NOPB have?
The LM809M3X-3.08/NOPB has an active-low reset output.
- What is the typical supply current of the LM809M3X-3.08/NOPB?
The typical supply current is 15 µA.
- What are the available package types for the LM809M3X-3.08/NOPB?
The available package types are TO-236-3, SC-59, and SOT-23-3.
- Is the LM809M3X-3.08/NOPB RoHS compliant?
Yes, the LM809M3X-3.08/NOPB is RoHS compliant.
- What is the minimum reset timeout for the LM809M3X-3.08/NOPB?
The minimum reset timeout is 140 ms.
- What are some common applications of the LM809M3X-3.08/NOPB?
Common applications include microprocessor systems, computers, controllers, intelligent instruments, and portable/battery-powered equipment.
- Does the LM809M3X-3.08/NOPB have power supply transient immunity?
Yes, the LM809M3X-3.08/NOPB has power supply transient immunity.
